Irwin 10501953 Speedhammer Plus Drill Bit 5.5mm X 300mm

The patented, unique single flute design ensures efficient,speedy removal of dust and lower vibrations and 28% greatercapacity meaning more efficient waste removal. They have a Patentedextra short drill bit head which means the head takes 80% of theworkload, ensuring higher durability and speed. Clears drillingdust directly into the flute, reducing the risk of clogging.